package chepter04.example15_17;
public class Example17 {
    public static void main(String[] args) {
        Animal a1 = new Dog();
        System.out.println("动物类a1= new Dog(）："+(a1 instanceof Animal));
        System.out.println("动物类a1= new Dog(）："+(a1 instanceof Dog));
        Animal a2 = new Animal();
        System.out.println("动物类a2= new Dog(）："+(a2 instanceof Animal));
        System.out.println("动物类a2= new Dog(）："+(a2 instanceof Dog));
    }
}